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Home Q & A Board Science-Related Homework Help Physics Astronomy
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adreamer adreamer
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6 years ago
The presence of which rocks show that between 2 and 3 billion years ago the atmosphere contained less than 1% of the amount of oxygen it contains today?
A) limestone
B) banded iron formations
C) silicate clays
D) sandstone
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Life in the Universe

Life in the Universe


Edition: 4th
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19Clyde19Clyde
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6 years ago
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adreamer Author
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6 years ago
This helped my grade so much Perfect
hannahspillett
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Yesterday
Smart ... Thanks!
annabananerz
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2 hours ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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